I certainly agree that we could make efforts to try to keep hard-core violent images.... I'm not concerned about the sex part. I'm concerned about the violent part. Consensual images aren't a problem for our children. That's what they should be learning from. It's the violent non-consensual images that they should not be exposed to.
How do we do that? As you say, it's going to be difficult because of the competing interest with free speech and free expression. It is a conversation we have to have, and even talking about it makes people think about the issue. We should be talking about the issue. Part of the problem isn't necessarily the images that, say, a teenager can look at. It's that they're looking at them alone without anybody talking about how this is not how real people live. It's the silence that pervades the issue.
How do we get conversations going about what meaningful consent looks like? What does non-violent healthy sexuality look like? That has to start with really young children. Our reticence about speaking about sex is part of the problem.